1. Have strong resistance to erosion.
2. Have strong antioxidant capacity.
3. Have good thermal shock resistance.
4. Have scouring of molten iron and slag.
Cement Free Alumina Refectory Castables Introduction
Cement free alumina refectory castables as a kind of hot sales refractory castable for furnace application in Rongsheng refractory castable factory manufacturing with widely used in various heat treatment furnaces such as heating furnaces and soaking furnaces and linings of rotary kiln. Cement free alumina castables refectory have good properties of anti-penetration, erosion resistance, impact resistance, wear resistance, good mechanical properties. There are for sale cheap No cement refectory castables in RongSheng fire bricks company can provide refractory castable free cement specification and category as well as competitive price & high grade quality refractory castable products, other specification according to customer requirements, welcome to contact us or email us for free quote or price list.
Cement Free Alumina Refectory Castables Definition
1.The refractory castable No cement is composed of refractory aggregate and powder, silica micropowder (less than 10 microns) or sol, trace dispersant and delayed coagulant. Cement free alumina castables refectory is made by micropowder or sol attack. The size is less than 10 microns, the finer the agglomeration effect , the more commonly used silica micropowders are SIO2, AL2O3, Cr2O3, ZrO2, MgO and raw refractory clay powder. depending on the main material of the castable, the choice is also different, often used Microsilica powder (smoke). In the refractory casting, the soot silicon micropowder can not only improve the working function (advance flow ability), but also lower the sintering temperature and the high temperature mechanical strength of the advancing castable.
2.Refractory cement free castable products, also known as ultra-fine powder bonded refractory castables, which have been developed on the basis of ultra-low cement refractory castables. Since the content of the casting is less than 0.2%, the low-melting materials such as calcium aluminum yellow feldspar are also few, so the high temperature function is excellent, the application of cement-free refractory castable is more important in important parts of thermal equipment such as kiln, the using of the effect cement free refractory castable is better.
Cement Free Alumina Refectory Castables Feature
1. Cement free castables has the characteristics of high density, high strength, low porosity, low wear, thermal shock and corrosion. Refectory castables cement free alumina have good use effect and significant social and economic benefits.
2. Refractory cement free castable has less impurities, less eutectic, and higher refractory temperature, corrosion resistance and high temperature structural strength than low-cement and ultra-low cement refractory castables. The No cement castable is simply composed of a ceramic structure after sintering, and the bonding strength proceeds as the heat treatment temperature advances.
Cement Free Alumina Refectory Castables Specification
| Item |
Ultra Low Cement Castable |
| Material |
High Alumina |
Corundum |
Corundum |
| Bulk Density (g/cm3) |
110℃*16h |
2.70 |
3.10 |
1.50 |
| 1500℃*3h |
2.65 |
3.05 |
1.45 |
| Al2o3(%) |
85 |
92 |
96 |
| Flexural Strength(Mpa) |
110℃*16h |
4 |
4 |
1 |
| 1500℃*3h |
8 |
10 |
4 |
| Compressive Strength(Mpa) |
110℃*16h |
13 |
15 |
4 |
| 1500℃*3h |
50 |
60 |
25 |
| Line change rate after burning(%) |
110℃*16h |
-0.1 |
-0.1 |
-0.1 |
| 1500℃*3h |
+-0.5 |
+-0.5 |
+-0.5 |
| Refractoriness |
℃ |
1790 |
1790 |
1790 |
| Safe Service Temperature |
℃ |
1550 |
1650 |
1700 |
Cement Free Alumina Refectory Castables Application
Cement free castables refectory is used in kiln furnaces with harsh conditions, such as reaction section of carbon black furnace, combustion chamber, throat. which use various kiln linings and insulation layers with a temperature of 1927 ℃ and a gas flow rate of 0.6-0.8 Mach. DC electric furnace cover.
Cement Free Alumina Refectory Castables Using Effect
1.The cement free refectory castable product has low impurity content, does not reduce the refractory temperature of the castable and the corrosion property of the slag, can be self-bonded during use, the high-temperature structural strength is advanced. Compared with ultra-low cement refractory castable, the high-temperature function of cement-free refractory castables is greatly improved.
2.The cement free refractory castable products, also known as ultra-fine powder bonded refractory castables, Cement free alumina refectory have been developed on the basis of ultra-low cement refractory castables. Since the content of the refractory casting is less than 0.2%, the low-melting materials such as calcium aluminum yellow feldspar are also few, so that the high-temperature function is excellent, refectory castables cement free alumina is used in an important part of thermal equipment such as a kiln, the using of the refractory castable effect is good.
Cement Free Refractory Castables Physical and Chemical Properties
The physicochemical properties of refractorty castables cement free combined with oxide ultrafine powders or oxide sols are similar to those of low cement and ultra-low cement castables, because of the low impurity content of such refractory castables, the eutectic phase is less in the material. Cement free refractory castable refractoriness, erosion resistance and high temperature structural strength are superior to low and ultra low cement castables. Due to the large surface area of the oxide ultrafine powder, large surface energy and high activity, such refractory materials are easy to be sintered, and the strength is higher after heat treatment than after drying.
Cement Free Refractory Castables Manufacturer in RongSheng Firebricks Factory
Rongsheng refractory castable factory has been engaged in refractory material industry for more than 20 years. Rongsheng refractory castable factory have a big technological team, there are more than 15 senior designers for the furnace & kiln. Refractory castable factory are good at different technological field, such as refractory bricks, refractory castable , lightweight insulation firebricks and prefabricated bricks according to client requirement .
Rongsheng refractory castable have rich refractory raw materials and 20 years experienced in the refractory bricks manufacturing. Rongsheng refractory castable can provide specification and category as well as competitive price & high-grade quality refractory castable products.
❉Rongsheng refractory castables manufacturer has four advantages
1.Rongsheng refractory bricks manufacturer have strong production capacity, supply is guaranteed.
2.Rongsheng refractory bricks company has professional refractory brick production plants and amorphous refractory production plants.
3.Rongsheng refractory bricks manufacture have advanced concepts and scientific management.
Rongsheng Refractory is constantly committed to quality management, process management and cost management, strives for internal strength, adheres to the development of science and technology, wins by quality and reputation, provides technical guidance services to provide customers with quality products and services.
4.Rongsheng refractory bricks manufacture have perfect after-sales service system
From raw material procurement to final product inspection and after-sales service. Ensure that the product offered to the user is 100% qualified.
